Title (fr)

Publication

Application

Priority

US 9803287 W 19980217

US 83367597 A 19970408

Abstract (en)

[origin: WO9845012A1] De-entrainment devices (28) are provided for separating an entrained liquid from a vapor stream exiting a flash zone (14) in a separation column (10). A de-entrainment device includes a de-entrainment tray (24) that has a tray deck (26) and a plurality of risers extending vertically up from the tray deck. The risers (32) are provided with a rotational vane (60) for imparting rotational movement to the fluid stream including the vapor stream and the entrained liquid, entering the riser. The rotational movement imparted to the fluid stream causes the liquid to separate from the vapor stream and to flow upward along riser walls (32). The de-entrained liquid is then transported from the above separation tray back into the flash zone by way of a liquid downcomer (40). The vapor stream separates from the liquid within the riser and flows out of the riser upward through the column. A riser hat (50) is used to prevent a wash liquid from entering the riser and the liquid downcomer.